AT49F512-70PC

Memory IC Overview

The AT49F512-70PC is a 5-volt-only in-system programmable and erasable Flash memory device manufactured by Microchip Technology. It provides 512K bits of nonvolatile storage organized as 65,536 words by 8 bits. The component features a fast read access time of 70 ns and supports byte-by-byte programming with a typical duration of 10 µs per byte. It includes an internal program control timer and hardware data protection mechanisms. The device operates within a commercial temperature range of 0°C to 70°C and utilizes a 32-lead Plastic Dual Inline Package (PDIP).

Memory IC Feature Summary

• Supports single voltage operation for both reading and reprogramming using only 5V inputs.
• Includes an optional 8K bytes boot block section with a reproprogramming write lockout feature for data integrity.
• Features hardware data protection against inadvertent programs via VCC sense, program inhibit states, and noise filters.

Memory IC Applications

• In-system reprogrammable code storage
• Boot block applications requiring secure code regions
• Nonvolatile data storage in embedded systems

Memory IC Procurement Notes

Verify the specific suffix 'PC' corresponds to the 32-lead PDIP package and commercial temperature rating during procurement. Confirm that the ordering code matches the required access time variant, as other speed grades exist. Ensure compatibility with existing 5V logic levels and check for moisture sensitivity handling requirements prior to assembly.

Memory IC Selection Notes

Select this component when a 512K-bit capacity with 70 ns access speed is required for 5V-only systems. Consider the PDIP package if through-hole mounting is necessary. Evaluate the need for the 8K boot block lockout feature based on security requirements. Compare against faster variants like the -50 or slower variants like the -90 depending on system timing constraints.

Memory IC Part Context

This part belongs to the AT49F512 series of 5-volt CMOS Flash memories. The series offers various access times (-50, -70, -90) and packages (PLCC, TSOP, VSOP, PDIP). The AT49F512 architecture allows for simple in-system reprogrammability without high input voltages, utilizing standard command sequences for erase and program operations.

Memory IC Replacement Considerations

Compatible substitutes include AT49F512-50PC for faster access or AT49F512-90PC for relaxed timing. Other package options such as PLCC (JC), TSOP (TC), or VSOP (VC) are available from the same manufacturer with identical electrical characteristics but different physical footprints.